Simon Pilgrim f6ff2cc7e0 [X86] X86FixupVectorConstantsPass - attempt to replace full width integer vector constant loads with broadcasts on AVX2+ targets (REAPPLIED) ...

lowerBuildVectorAsBroadcast will not broadcast splat constants in all cases, resulting in a lot of situations where a full width vector load that has failed to fold but is loading splat constant values could use a broadcast load instruction just as cheaply, and save constant pool space.

This is an updated commit of ab4b924832 after being reverted at 78de45fd4a

2023-06-14 12:48:33 +01:00

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